[  OK  ] Reached target Login Prompts.
[  OK  ] Reached target Multi-User System.
[  OK  ] Reached target Graphical Interface.
         Starting Update UTMP about System Runlevel Changes...
[  OK  ] Started Update UTMP about System Runlevel Changes.


Debian GNU/Linux 9 syzkaller ttyS0

Warning: Permanently added '10.128.0.200' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   40.481930][ T7008] overlayfs: upper fs does not support xattr, falling back to index=off and metacopy=off.
[   40.495368][ T7008] ------------[ cut here ]------------
[   40.500902][ T7008] kernel BUG at mm/hugetlb.c:3775!
[   40.507175][ T7008] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   40.513238][ T7008] CPU: 0 PID: 7008 Comm: syz-executor754 Not tainted 5.6.0-syzkaller #0
[   40.521535][ T7008] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   40.531580][ T7008] RIP: 0010:__unmap_hugepage_range+0xe7b/0xeb0
[   40.537713][ T7008] Code: bc 24 e8 00 00 00 e8 44 01 04 00 e9 9f fe ff ff e8 9a 3a c6 ff 0f 0b e8 93 3a c6 ff 0f 0b e8 8c 3a c6 ff 0f 0b e8 85 3a c6 ff <0f> 0b e8 7e 3a c6 ff 48 89 ef e8 d6 2d f3 ff 0f 0b e8 6f 3a c6 ff
[   40.557329][ T7008] RSP: 0018:ffffc90001277a08 EFLAGS: 00010293
[   40.563367][ T7008] RAX: ffffffff81afc64b RBX: 0000000000003000 RCX: ffff888092fb0280
[   40.571443][ T7008] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000000000000
[   40.579394][ T7008] RBP: ffff8880a24f5670 R08: ffffffff81afb994 R09: ffffed1014585bb3
[   40.587427][ T7008] R10: ffffed1014585bb3 R11: 0000000000000000 R12: 0000000020000000
[   40.595370][ T7008] R13: dffffc0000000000 R14: ffffffff8b59bd48 R15: 0000000020003000
[   40.603313][ T7008] FS:  00000000010ec880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   40.612208][ T7008] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.618772][ T7008] CR2: 00007fa219ae0000 CR3: 0000000092ec9000 CR4: 00000000001406f0
[   40.626730][ T7008] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   40.634700][ T7008] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   40.642643][ T7008] Call Trace:
[   40.645910][ T7008]  ? lock_acquire+0x169/0x480
[   40.650565][ T7008]  __unmap_hugepage_range_final+0x31/0x70
[   40.656257][ T7008]  unmap_single_vma+0x260/0x2d0
[   40.661078][ T7008]  unmap_vmas+0x15d/0x2c0
[   40.665381][ T7008]  exit_mmap+0x276/0x530
[   40.669599][ T7008]  __mmput+0x113/0x350
[   40.673641][ T7008]  exit_mm+0x4cd/0x550
[   40.677681][ T7008]  ? taskstats_exit+0x474/0xba0
[   40.682501][ T7008]  do_exit+0x56e/0x1f80
[   40.686641][ T7008]  ? vm_mmap_pgoff+0x1b2/0x1e0
[   40.691391][ T7008]  do_group_exit+0x15e/0x2c0
[   40.695954][ T7008]  ? trace_irq_disable_rcuidle+0x1f/0x1d0
[   40.701644][ T7008]  __do_sys_exit_group+0x13/0x20
[   40.706552][ T7008]  __se_sys_exit_group+0x10/0x10
[   40.711459][ T7008]  __x64_sys_exit_group+0x37/0x40
[   40.716467][ T7008]  do_syscall_64+0xf3/0x1b0
[   40.720944][ T7008]  entry_SYSCALL_64_after_hwframe+0x49/0xb3
[   40.726810][ T7008] RIP: 0033:0x43efe8
[   40.730687][ T7008] Code: Bad RIP value.
[   40.734724][ T7008] RSP: 002b:00007ffda517a608 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   40.743103][ T7008] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043efe8
[   40.751043][ T7008] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
[   40.758994][ T7008] RBP: 00000000004be7e8 R08: 00000000000000e7 R09: ffffffffffffffd0
[   40.766940][ T7008] R10: 0000040000000011 R11: 0000000000000246 R12: 0000000000000001
[   40.774892][ T7008] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
[   40.782835][ T7008] Modules linked in:
[   40.792834][ T7008] ---[ end trace ddba2a8e963ecc08 ]---
[   40.798285][ T7008] RIP: 0010:__unmap_hugepage_range+0xe7b/0xeb0
[   40.804599][ T7008] Code: bc 24 e8 00 00 00 e8 44 01 04 00 e9 9f fe ff ff e8 9a 3a c6 ff 0f 0b e8 93 3a c6 ff 0f 0b e8 8c 3a c6 ff 0f 0b e8 85 3a c6 ff <0f> 0b e8 7e 3a c6 ff 48 89 ef e8 d6 2d f3 ff 0f 0b e8 6f 3a c6 ff
[   40.824461][ T7008] RSP: 0018:ffffc90001277a08 EFLAGS: 00010293
[   40.830513][ T7008] RAX: ffffffff81afc64b RBX: 0000000000003000 RCX: ffff888092fb0280
[   40.838491][ T7008] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000000000000
[   40.846823][ T7008] RBP: ffff8880a24f5670 R08: ffffffff81afb994 R09: ffffed1014585bb3
[   40.854821][ T7008] R10: ffffed1014585bb3 R11: 0000000000000000 R12: 0000000020000000
[   40.862813][ T7008] R13: dffffc0000000000 R14: ffffffff8b59bd48 R15: 0000000020003000
[   40.870771][ T7008] FS:  00000000010ec880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
[   40.879723][ T7008] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   40.886337][ T7008] CR2: 00007fa219ae3000 CR3: 0000000092ec9000 CR4: 00000000001406f0
[   40.894324][ T7008] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   40.902283][ T7008] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   40.910287][ T7008] Kernel panic - not syncing: Fatal exception
[   40.917523][ T7008] Kernel Offset: disabled
[   40.921836][ T7008] Rebooting in 86400 seconds..